Special designed aeration vents provides to exhaust air while preventing the insects and birds to get inside the silo. Also inside the vents there are special ailerons which helps to prevents snow and rain leakage inside the silo. According to the customer demands aeration vents are suitable to integrate for fumigation by manuel and electrical lids. On the other hand, as seen in the photo side. Pre-cut roof vent opening on the roof panels provides, easy installation and surrounding embossment to ensure water run-off, insulatin and increased rigidity.